David conlan



D. CONLAN.

. Shade for Billiard Tables.

No. 24,285. Patented June 7,1859.

42 F I I l fii'iizes U I [raven Z07:

Nv PETERS. Phnm-Lilhagmpher. Washington. 0. c.

UNITED STATES PATENT OFFICE.

DAVID GONLAN, OF NEW YORK, N. Y.

LIGHT-SHADE FOR BILLIARID-TABLES.

Specification forming part of Letters Patent No. 24,285, dated June '7,18159; Reissued October 6,

To all whom it may concern:

Be it known that I, DAVID CoNLAN, of the city, county, and State of NewYork, have invented a new and Improved Shade for Billiard-Tables, &c.;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which I Figure 1represents a longitudinal vertical section of a shade constructedaccording to my invention. Fig. 2 is a transverse vertical section ofthe same. Fig. 3 is a diagram showing its application to a billiardtable.

Similar letters of reference in the three views indicate correspondingparts.

This invention consists in arranging the shades used over the lights inbilliard rooms etc. in such a manner that all the light is concentratedon the tables while the space beyond the tables is left comparativelydark which object is obtained by making the shades square and by givingto their sides such an inclination that the light is confined on acertain width and breadth below, and that the light thrown on theceiling is reflected on the table without going beyond it.

To enable those skilled in the art to make and use my shade I willproceed to describe the same. a

A represents a gas burner or any other source of light which serves toilluminate a billiard table or any other space confined between certainlimits and secured to this burner by means of a sleeve, a, and supportedby the arms, I), is the shade, B, which is made of tin or other sheetmetal, or of any other suitable material and which consists of twodistinct parts, the lower part, B, serving to confine the light on thetable or space to be illuminated and the upper part, B, serving tospread the light over a certain portion of the ceiling, from which it isreflected on the table, but not beyond the same. It will be easilyunderstood, that to obtain this object, the sides of the shades have tobe inclined at different angles, as the gas burners or other sources oflight are generally not in the center of the table or space to beilluminated, and especially for billiard tables two burners aregenerally used which are situated in a plane drawn vertically throughthe center of the table in a longitudinal direction, but each of whichis considerably nearer to one of the narrow sides of the table than tothe other. And as Fig. 1 represents a section of the shade in alongitudinal direction, it will be noticed that the side, 0, which facesthe narrow side of the table farthest from the shade, is considerablymore inclined than the side, (Z, facing the narrow side of the tablenearest to the shade and for the same reason both sides of the shade,which appear in Fig. 2, have an equal inclination as the shade is atequal distance from the two long sides of the table. The precise anglesof inclination for the several sides, however, depend not only upon thesize of the table, but also upon the height of the shade above thetable, .and they will vary to some extent according to circumstances.The inclination of the four sides which constitute the upper part of theshade on the other hand is equal or nearly so, and these sides divergetoward the ceiling so that the light is permitted to spread to a certainextent whereby that portion of the ceiling over the table is illuminatedand the rest left in darkness, and that the reflection of the light fromthe ceiling assists to throw more light on the table; By these meanseach point on the table is equally illuminated as will be readilyunderstood from the diagram represented in Fig. 3, where the rays fromeach flame spread over the whole table without interfering in any waywith each other, and by using my shades I am enabled to illuminate thetable with two flames as perfect as it can barely be done with fourflames without these shades. But if it should be desirable to use morethan two flames all I have to do is to give my shades the proper shapeaccording to their dis tances from the several sides ofthe tables, and Ican confine the light of any quantity of flames on the required space orwithin certain limits.

Having thus described my invention, I claim and desire to secure byLetters Patent, as an improved article of manufacture,

A shade for billiard tables, &c., having two reflecting parts B, B, andotherwise made as herein shown and described.

DAVID CONLAN.

VVitnesses-z WM. TUSCH, R. S. SPENCER.

